Automatic clamping pressure mechanism.



No. 844,515. PATENTED 31113.19, 1907 J. M., J., A. J. & s. A. GIMSON.

AUTOMATIO GLAMV'P-ING PRESSURE MECHANISM.

APPLIOATION FILED MAR. 25. 1904.

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No- 844,515. PATENTED FEB. 19, 1907.

J. M., J., A. J. & S. A.-GIMSON. AUTOMAIIG GLAM PING PRESSURE MECHANISM.

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APPLIOATION FILED MAR. 25. 1904.

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UNITED STATES PATENT OFFICE.

JOSIAH MENTOR GIMSON, JOSIAH GIMSON, ARTHUR JAMES GIMSON, AND SYDNEY ANSELL GIMSON, OF LEICESTER, ENGLAND.

Specification of Letters Patent.

. Patented Feb. 19, 1907.

Application filed March 25,1904. Serial No. 200.070.

to be employed, constructed, and employed for outside or inside heel building or attaching, sole-leveling, stamping, embossing, and other operations of a like kind in the manufacture of boots and shoes.

The object of the said improvements is to provide automatic clamping pressure mechanism that will exert a direct clamping ressure, which is transmitted by plates andb ocks upon a plunger, so as to adapt itself and exert the necessary pressure in all the different variations in the height of heels or other articles and in the inequalities of material, and to hold and ress them perfectly solid 11 on or in the hee ing'or nailing stand for buil ing or attaching them to a boot or shoe.

That this invention may be well understood drawings accompany this specification, in which Figure 1 is a partly-sectional elevation of a heel-building machine embodying this inven tion; and Figs. 2 and 3, Sheet 2, are sections, respectively, through the head of the press, taken on lines a b and c d; and Fig. 4, Sheet 2, is a sectional elevation of Fig. 1, Sheet 1.

In carrying out this invention relative to the top cross-head A spaces are provided for carrying the plunger B and the guide-rods F, which are attached to both the top and bottom cross-heads in the ordinary manner. The plunger B is provided with a removable foot or heel pad B at the bottom thereof. A space is left within the cross-head A to hold the gripping-blocks C.

It will be well understood that in small heel-attaching machines both for inside or outside nailing only one set of the levers,

blocks, and plates are required. One of the faces of the gripping-blocks C is hollowed out and so shaped as to fit half round the plunger to grip it, (see dotted line, Fig. 1,) and in the opposite face of each of the said blocks is a recess large enough to admit of one of the plates D to be placed therein, the other end of such plates fitting in recesses in the periphery of the levers E, which are pivoted to the upper cross-head A in spaces contiguous to the gripping-blocks C, said levers E being parallel to the tie-rods F, which rods are fitted to the top cross-head A and pass through the pillars or carriers F, and the bottoms thereof are secured to the lower cross-head, as shown in Figs. 1 and 4. The lower free ends of the levers E carry rollers G, which engage with the horizontally-disposed eccentric cams H and I, looselyfitted on the pillars or rod-carriers F. Said cams after being turned to the right position are made fast by the set-screws h and i, and so regulate the pressure of the lower ends of the lovers E. To adjust the top of the adjustably-fulcrumed levers E with. the plates D, the pins J (seen in Figs. 2 .and 3) are employed, the central portion of which is eccentric and the remaining parts concentric, and when required to be turned a key with two pins to fit in the holes 1' is employed when desired.

The before-mentioned contrivances are shown as applied to a movable top crosshead but they may also be applied to a fixed top cross-headthat is to say, to a machine in which the nail stand or die is caused to rise upward to a stationary head or opposite C, and the plunger B will be either raised or lowered. After the plunger has been moved down with its foot or pad B nearly touching or just within reach of the heel to be operated upon the roller ends G of the levers E will simultaneously leave the face of the cams H, and the foot of the plunger B falls onto the heel and remains there until the machine makes a further movement, when the rollers G of the levers E engage the cams I and when the lower ends of the levers E will'be pushed farther out, and so alter the position of the plates D and press against the gripping blocks C with such a force that the plunger B is held from further movement relative to the cross-head A, the foot or pad of the plunger bearing upon the heel to make it solid and hold it against the opposite action of naildriving. After the rollers Gr have left the lower cams I and before they engage the upper cams H the gripping-blocks O release the 5 plunger B, when it immediately adapts itself to the height of the heel. The adjustablyfulcrurned levers E exert a direct action transmitted by, the plates D and grippingblocks C upon the said plunger.

It is obvious that the aforesaid contrivances are' not confined to the machine as illustrated in the drawings, for they can be fitted to others in which the plunger can be made to adapt itself to the height or thickness of the article or material to be operated upon.

We would have it understood that no claim is made to the cams which operate the lower cross-head, and therefore no reference- 20 letters are employed to that portion.

We claim- In a machine of the character described the combination with upper and lower crossheads, of rods connecting said cross-heads,

engaging said cams, and transmitting-plates connecting said levers and gripping-blocks, substantially as and for the purpose set forth. In testimony whereof we have signed-our names to this specification in the presence of two subscribing witnesses.

JOSIAH MENTOR GIMSON. JOSIAH GIMSON. ARTHUR JAMES GIMSON. SYDNEY ANSELL GIMSON. NVitnesses ,l

FRED F. WIGGINS, GEORGE WM. OOLTMAN. 

